Experimental study on combustion and pollutants emissions of oil sludge blended with microalgae residue

Gong, Zhiqiang; Wang, Lei; Wang, Zhenbo; Wang, Zhentong; Xu, Yao−Zhong; Sun, Faqiang; Sun, Zhiqian; Liu, Zhaozeng; Zhu, Liyun

doi:10.1016/j.joei.2017.10.001

Cited by 33 publications

(8 citation statements)

References 56 publications

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“…Many countries have identified oily sludge as a Dangerous Waste because of its many hazardous ingredients [ 2 ]. Several treatment methods have been widely studied and applied, including chemical extraction [ 3 ], thermal desorption [ 4 ], microwaving [ 5 ], incineration [ 6 – 8 ], and microbial degradation [ 9 , 10 ]. However, the oily sludge that remains after conditioning and solid-liquid separation generally has high moisture content and low oil content (e.g., crude oil 1.8 wt%, water 65.8 wt%).…”

Section: Introductionmentioning

confidence: 99%

Facilitating the natural semi-drying of oily sludge by changing the form of water

et al. 2021

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Reducing the water content of oily sludge is essential for the disposal of it. Despite conditioning and solid-liquid separation, the water content of oily sludge generally exceeds 65%. A large amount of this water exists in the form of emulsified and bound water, reducing the efficiency of water removal during the natural semi-drying process of oily sludge. To shorten the time required for natural semi-drying, this study applied an orthogonal test to screen an oily sludge modified material (OSM). The effect and mechanism of OSM on the natural semi-drying of oily sludge were studied using a thermal gravimetric analyzer (TGA), scanning electron microscope (SEM), surface tension measurement, and microscopic observations. The results show that when the ambient temperature exceeded 10°C, the OSM increased in mass by 8–10%, and the time required for the natural semi-drying of oily sludge was shortened from 15 days to less than 5 days. OSM can rupture the emulsion, reduce the surface tension, convert the emulsion and bound water in the oily sludge into free water, and accelerate the rate of water migration, diffusion, and natural evaporation from the inside of the oily sludge to the surface and air. The research results show that changing the form of water can speed up the drying of oily sludge, creating positive economic benefits in the process of oily sludge reduction and recycling.

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Section: Introductionmentioning

confidence: 99%

Facilitating the natural semi-drying of oily sludge by changing the form of water

et al. 2021

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“…Some scholars have researched the combustion behavior and interactive effects of co-combustion. Gong et al 26 studied the co-combustion of microalgae residue and oil sludge in a thermogravimetric analyzer and a designed fluidized bed reactor system and found that emissions of NO x and SO 2 decreased with increases in the microalgae residue ratio at 800 C. Sezer et al 27 investigated the synergistic effects in an Imbat coal and almond shell cocombustion process through the use of thermogravimetric and kinetic analyses with a combustion index and concluded that an increase in the number of almond shells will enhance the reaction rate and the combustion index due to the decrease in the ignition and burnout temperatures. Qi et al 28 investigated the co-combustion performance and slagging characteristics of Zhundong coal and sludge, and their results confirmed an interaction between Zhundong coal and sludge and improved performance due to an Na catalytic action.…”

Section: Introductionmentioning

confidence: 99%

Co‐combustion characteristics of black liquor and waste oil sludge

Chen

et al. 2021

Intl J of Energy Research

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In this study, the co-combustion of black liquor and oil sludge is investigated.The properties of the fuels are analyzed, and the co-combustion characteristics are explored by thermogravimetric analysis coupled with Fourier transform infrared spectroscopy (TG-FTIR). The synergistic effect, activation energy as well as gas yield are also studied from TG-FTIR results. The results show that the addition of oil sludge can promote the reaction in the early stage, as indicated by the combustion characteristic index and the flammability index. The TG-FTIR also shows that the swelling behavior of black liquor appears to block the release of volatile matter. The weaker SO 2 emission and XRF analysis for the black liquor indicate that most of the sulfur remained in the ash. A positive synergy effect existed in the early stage, and the activation energy decreased with the addition of oil sludge. Distinct stages could be observed in the single pellet combustion experiments. Adding oil sludge to the black liquor promoted surface bubbles and ash melting. Surface bubbles indicate more volatile breaks through the plastic state layer formed on the black liquor and increase the reaction. However, adding oil sludge should be controlled to reduce the hindrance to the reaction due to ash melting.

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“…Oil sludge (OS) is one of the main pollutants in the petroleum and petrochemical industry. If it is not treated and discharged directly, it not only occupies a large amount of cultivated land but also pollutes the surrounding soil, water, and air . A lot of work has been done on the utilization of oil sludge in recent years, including pyrolysis, , solidification, microwave, bioremediation, , and so on .…”

Section: Introductionmentioning

confidence: 99%

“…If it is not treated and discharged directly, it not only occupies a large amount of cultivated land but also pollutes the surrounding soil, water, and air . A lot of work has been done on the utilization of oil sludge in recent years, including pyrolysis, , solidification, microwave, bioremediation, , and so on . Among these technologies, oil sludge pyrolysis has gained much attention due to its wonderful development prospect for resource utilization of OS .…”

Section: Introductionmentioning

confidence: 99%

Study on Preparation of an Oil Sludge-Based Carbon Material and Its Adsorption of CO₂: Effect of the Blending Ratio of Oil Sludge Pyrolysis Char to KOH and Urea

et al. 2019

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How to prepare a low-cost carbon material with a high carbon dioxide (CO 2 ) adsorption performance has attracted much attention worldwide. Oil sludge, a hazardous solid waste, needs to be disposed off properly. Oil sludge pyrolysis has been proven to be an effective method for waste treatment with the production of pyrolysis oil, gas, and char. In this study, nitrogen-doped carbon (NC) was prepared and characterized based on oil sludge pyrolysis char (OSC). Specifically, NCs were generated by mixing OSC with potassium hydroxide and urea under different blending ratios of 1:3:2, 1:3:3, and 1:3:4 at 700 °C. NCs showed good surface morphology and pore structures with large specific surface areas (1056.45−1138.15 m 2 •g −1 ), pore volumes (1.54−1.63 cm 3 •g −1 ), and a wide range of pore size distribution. The best CO 2 adsorption capacity of NCs at room temperature and pressure is 3.3 mmol•g −1 under a blending ratio of 1:3:2. In addition, the CO 2 /N 2 selectivity of NCs is as high as 8.434. The adsorbent synthesized from oil sludge by a simple and low-cost method is a promising material for carbon dioxide adsorption.

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Experimental study on combustion and pollutants emissions of oil sludge blended with microalgae residue

Cited by 33 publications

References 56 publications

Facilitating the natural semi-drying of oily sludge by changing the form of water

Facilitating the natural semi-drying of oily sludge by changing the form of water

Co‐combustion characteristics of black liquor and waste oil sludge

Study on Preparation of an Oil Sludge-Based Carbon Material and Its Adsorption of CO₂: Effect of the Blending Ratio of Oil Sludge Pyrolysis Char to KOH and Urea

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Experimental study on combustion and pollutants emissions of oil sludge blended with microalgae residue

Cited by 33 publications

References 56 publications

Facilitating the natural semi-drying of oily sludge by changing the form of water

Facilitating the natural semi-drying of oily sludge by changing the form of water

Co‐combustion characteristics of black liquor and waste oil sludge

Study on Preparation of an Oil Sludge-Based Carbon Material and Its Adsorption of CO2: Effect of the Blending Ratio of Oil Sludge Pyrolysis Char to KOH and Urea

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Product

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Study on Preparation of an Oil Sludge-Based Carbon Material and Its Adsorption of CO₂: Effect of the Blending Ratio of Oil Sludge Pyrolysis Char to KOH and Urea